Quote:
Originally Posted by mldee
Where is the ntc sensor measuring? Hot or cold side, heat sink, etc? I presume you're using a large enough 12V supply?
My suggestion would probably be to have the sensor measure the cold side of the peltier. This should then command the controller to either heat or cool that side as per the dial setting.
BTW, I have a DSII OSC with attached Peltier unit. You're welcome to borrow it if you wish. My solution in 2009 to making it work well was to put it in my cupboard and buy a QHY8
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G'day Mike.
The sensor is attached to the controller via a 1 metre wire. The sensor measures wherever you put it. I've got it velcro'd to the back of the camera body alongside a second sensor that feeds readings straight to my PC/Laptop.
I've done a DSI II mod also - and now have it dropping by about 16-17C (measured inside the case). I reckon that's about as far as I can take that one and hopefully I'll get some use out of it doing some lunar/planetary stuff with a Barlow and suchlike. One day.
As for the suggestion of swapping the polarity, I did think of that but backed off because there was something more fundamental going on - the fan not getting power and not being able to actually set the temp range on the device.
SO, my request for help still stands guys.
Anyone who has used or is using one of these, could you please PM me with some idea of how to use it.
Peter